Product Uniformity Control (PUC)
Research Project , 2013 – 2017

The uniformity of the microstructure of steel strip over the entire coil length (“intra-coil uniformity”) and between different coils of the same grade (“inter-coil uniformity”) is key to consistent material behaviour at steel manufacturers’ proprietary processes like rolling and customers’ processes like pressing and deep-drawing. Evidently, stable and consistent processes yield optimal product quality and maximize efficiency, giving minimal loss of material and energy over the entire production chain. The steel manufacturers already control the quality of their products by tensile testing and microstructure analysis of samples taken at the coil head or tail. Whereas this procedure yields data on the “inter-coil uniformity”, the “intra-coil uniformity” can be monitored and improved only using continuous product measurements over the full length of the strip. Since the microstructure of steel governs the electromagnetic and ultrasonic properties, practically all measurement techniques to monitor the microstructure online are based on sensing these properties. Despite many efforts however, the steel research community has not established unique and universal relationships between the online measured parameters and microstructure. In this perspective, the present proposal Product Uniformity Control (PUC) is not aiming for absolute prediction of microstructure parameters, but seeks for relative relationships in order to improve both “inter-coil” and “intra-coil” uniformity of steel strip. The PUC proposal follows an integrated research path of modelling, laboratory tests and dedicated plant trials to enhance the understanding of the relation between microstructure and online measured parameters. It also aims to understand and reduce cross-sensitivities of the sensor systems to measurement conditions like speed and lift-off. Finally, it investigates the quality and monetary benefits from application of continuous product uniformity monitoring in the steel industry.


Håkan Wirdelius (contact)

Advanced Non-destructive Testing


ArcelorMittal Eisenhüttenstadt

Eisenhüttenstadt, Germany

ArcelorMittal Maizières Research SA

Maizières-lès-Metz, France

Cedrat Technologies

Meylan, France

CEIT - Centre of Studies and Technical Research

San Sebastian, Spain

Netherlands Organisation for Applied Scientific Research (TNO)

Delft, Netherlands

Salzgitter Mannesmann Forschung

Salzgitter, Germany

Sant'Anna School of Advanced Studies (SSSUP)

Pisa, Italy


Kista, Sweden

Tata Steel, Netherlands

IJmuiden, Netherlands

The French Alternative Energies and Atomic Energy Commission (CEA)

Gif-sur-Yvette, France

ThyssenKrupp Steel Europe AG

Duisburg, Germany

Universite Joseph Fourier Grenoble 1

Grenoble, France

University of Birmingham

Birmingham, United Kingdom

University of Manchester

Manchester, United Kingdom


European Commission (EC)

Project ID: NoRFSR-CT-2013-00031PUC
Funding Chalmers participation during 2013–2017

Related Areas of Advance and Infrastructure

Sustainable development

Driving Forces

Materials Science

Areas of Advance


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